How many passport-style photos of each for marriage-based adjustment of status application concurrent filing with I-130?

Look closely at the instructions for each of the forms ... or pay an attorney for a consultation.

It is never a good idea to start working before an approval is issued. You will probably be OK if the new employer files the H-1B papers during...

What to write if I do not know certain information that is applicable in form I-30A?

You can put N/A, or unknown. BUT try harder to learn of your parent's birth dates.

Chances of h4 approval for current spouse ( "divorced legally from ex spouse in India") in Visa stamping interview ?

No one can answer a 'what are my chances' type of question without knowing more and looking at more documents. Have a private Skype consultation...

Can I help manage business overseas with no financial return to me while on h1b in the US?

This is not a good idea. Even if you won't be receiving any financial gain ... you will be 'working'.

USCiS said my case is ready for review ?

There is no fixed time period for a review to take place. What type of case is it?

How can I get my online social security account from my biological mom?

Call the SS office and ask them to re-set your account password. Also, you can go to a SS office and request a replacement card.

Jointly filed I-751 form and it is under process. If we go for mutual divorce, will it be dangerous to my I-751 process?

If the divorce becomes final before the I-751 is approved ... your 10 year grencard will be invalid.

This question should best be answered by the 'responsible officer' that signed your DS-2019

Q: 1. Would it be possible to transfer my old H1B (approved petition in 2008, but not gone for any visa stamping for that approved H1B petition...